def main():
    import math
    n,k = map(int,input().split())
    a = list(map(int,input().split()))
    def f(a,l):
        ans = 0
        for i in range(len(a)):
            ans += math.ceil(a[i]/l)-1
        return ans
    l,r = 1,max(a)
    while r-l>1:
        mid = (l+r)//2
        g = f(a,mid)
        if g>k:
            l = mid+1
        else:
            r = mid
    if f(a,l)<=k:
        print(l)
    else:
        print(r)

if __name__ == "__main__":
    main() def main():
    import math
    n,k = map(int,input().split())
    a = list(map(int,input().split()))
    def f(a,l):
        ans = 0
        for i in range(len(a)):
            ans += math.ceil(a[i]/l)-1
        return ans
    l,r = 1,max(a)
    while r-l>1:
        mid = (l+r)//2
        g = f(a,mid)
        if g>k:
            l = mid+1
        else:
            r = mid
    if f(a,l)<=k:
        print(l)
    else:
        print(r) main import math math n,k = map(int,input().split()) n map(int,input().split()) map int input().split() ().split () input split k a = list(map(int,input().split())) a list(map(int,input().split())) list map(int,input().split()) map int input().split() ().split () input split def f(a,l):
        ans = 0
        for i in range(len(a)):
            ans += math.ceil(a[i]/l)-1
        return ans
     f ans = 0 ans 0 for i in range(len(a)):
            ans += math.ceil(a[i]/l)-1
         i range(len(a)) range len(a) len a ans += math.ceil(a[i]/l)-1 ans math.ceil(a[i]/l)-1 math.ceil(a[i]/l) math.ceil math ceil a[i]/l a[i] a i l 1 return ans ans a a l l l,r = 1,max(a) l 1 r max(a) max a while r-l>1:
        mid = (l+r)//2
        g = f(a,mid)
        if g>k:
            l = mid+1
        else:
            r = mid
     r-l>1 r-l r l 1 mid = (l+r)//2 mid (l+r)//2 l+r l r 2 g = f(a,mid) g f(a,mid) f a mid if g>k:
            l = mid+1
        else:
            r = mid
     g>k g k l = mid+1 l mid+1 mid 1 r = mid r mid if f(a,l)<=k:
        print(l)
    else:
        print(r) f(a,l)<=k f(a,l) f a l k print(l) print l print(r) print r if __name__ == "__main__":
    main() __name__ == "__main__" __name__ "__main__" main() main def main():
    import math
    n,k = map(int,input().split())
    a = list(map(int,input().split()))
    def f(a,l):
        ans = 0
        for i in range(len(a)):
            ans += math.ceil(a[i]/l)-1
        return ans
    l,r = 1,max(a)
    while r-l>1:
        mid = (l+r)//2
        g = f(a,mid)
        if g>k:
            l = mid+1
        else:
            r = mid
    if f(a,l)<=k:
        print(l)
    else:
        print(r) def main():
    import math
    n,k = map(int,input().split())
    a = list(map(int,input().split()))
    def f(a,l):
        ans = 0
        for i in range(len(a)):
            ans += math.ceil(a[i]/l)-1
        return ans
    l,r = 1,max(a)
    while r-l>1:
        mid = (l+r)//2
        g = f(a,mid)
        if g>k:
            l = mid+1
        else:
            r = mid
    if f(a,l)<=k:
        print(l)
    else:
        print(r) main
def main():
    import math
    n,k = map(int,input().split())
    a = list(map(int,input().split()))
    def f(a,l):
        ans = 0
        for i in range(len(a)):
            ans += math.ceil(a[i]/l)-1
        return ans
    l,r = 1,max(a)
    while r-l>1:
        mid = (l+r)//2
        g = f(a,mid)
        if g>k:
            l = mid+1
        else:
            r = mid
    if f(a,l)<=k:
        print(l)
    else:
        print(r)

if __name__ == "__main__":
    main()
